Edit, convert, and transform documents across PDFs, Office formats, HTML, TXT, CSV, RTF, JSON, and images with ComPDF Self-hosted, an open-source PDF platform.

GxPDF - Enterprise-grade PDF library for Go. Table extraction, text parsing, encryption, document creation.

A javascript tool to sign a pdf in web browser, google apps script and nodejs.

Investigation in PDF encryption

PDF-Dateien erzeugen, miteinander verbinden, drucken, Seiten entnehmen, Bilder extrahieren, verschlüsseln (128-Bit RC4/AES oder 256-Bit AES), mit Wasserzeichen oder Stempel versehen, uvm.

Encrypt PDFs client-side in an installable PWA

一个强大的OFD/PDF签章工具，支持格式转换、文档加密、电子签名、数字印章和完整性保护。A powerful OFD/PDF signing tool that supports format conversion, document encryption,electronic signature, digital seal, and integrity protection.

Laravel package to password-protect all pages in PDFs.

cli for adding, removing or modifying PDF files passwords

PDF-guard is a python app that helps you to secure a PDF file by encrypting it with a password.

Define a practical framework to learn cryptography in use

A collection of my Bash and Python scripts to simplify a variety of tasks.

Guesses password to specified PDF in argument. Inspired by Al Sweigart's Automate the Boring Stuff with Python: Chapter 13.

High-performance PDF library for C# and .NET. Merge, split, rotate, crop, remove pages, edit metadata, add watermarks, encrypt/decrypt PDFs, apply password protection, perform Tesseract OCR, and reduce file size with advanced PDF compression and image optimization.

This is a 'pdf project' created using python with the help of tkinter & pypdf

PDF-Encryptor

Add password in command line to every PDF in folder and subfolders. Inspired by Al Sweigart's Automate the Boring Stuff with Python: Chapter 13.

This Python script allows you to encrypt PDF files with a numeric password. The password will be required to open the encrypted PDF file.This pdf encryption is good for managing privacy and to maintain distance between attacker and client.

轻卷 LightScroll - 4MB 的本地 PDF 工具箱。阅读/水印(图层+防删除栅格)/AES加密解密/合并拆分/转图片/压缩,不上传不付费。Local-first PDF toolbox: viewer, watermark (removal-proof rasterize mode), encrypt/decrypt, merge, split, compress. Tauri + Vue3 + pdf.js.

🔧 Powerful PDF manipulation tool with both CLI and web interface. Merge, split, encrypt, fill forms, and manage attachments. Inspired by pdftk, built with Python & Flask.